Health and Safety

Local Exhaust Ventilation (LEV)

Local Extract Ventilation (LEV) is the name given to equipment used to protect an operator from hazardous substances including dusts, chemicals or micro-organisms. 

Contaminants which require exposure control may be in the form of gas, vapour, mist, dust/powders, and nano materials and can include chemical substances (carcinogens, mutagens, toxins, flammable solvents) and micro-organisms.

Types of LEV

LEV can take a variety of forms depending on the type of contaminant /process that it is to control exposure to. University Guidance (Appendix 1) PDF format shows a variety of different types of LEV that may be in use within the University to control exposure and therefore that will fall within the scope of the policy and HSE Guidance.


For further detail on this topic, please refer to the University's guidance PDF format which has been produced to ensure that the University complies with The Control of Substances Hazardous to Health (COSHH) Regulations 2005 and in accordance with HSE Guidance ‘Controlling Airborne Contaminants at Work – A Guide to Local Exhaust Ventilation, HSG 258.


Health and Safety Department

Pharmacy Building (Building 63)
University Park
University of Nottingham
Nottingham, NG7 2RD

Telephone: Telephone: +44 (0)115 9513401
Email: h&